Sprinkler with adjustable cam



w. H. MANNING 2,565,926 SPRINKLER WITH ADJUSTABLE CAM mg. z8, 1951 Filed June 28, 1945 2 Sheets-Sheet 1 JNVENTOIL A Aug. 28,' 1951 w, H MANNNG 2,565,926

SPRINKLER WITH ADJUSTABLE cm Filed June 28. 1945 2 Sheets-Sheet 2 Patented Aug. 28, 1951 UNITED STATES PATENT oFFlcE 2,565,926 SPRINKLER WITH ADJUSTABLE CAM Willian H. Manning, Birmingham, Mich. Application June 28, 1945, Serial No. 602,039

9 Claims. l

The invention relates to lawn sprinkling devices, and it has particular relation to a rotary type of lawn sprinkler. The use of lawn sprinkling devices is Widespread and innumerable types of sprinkling devices have been and are used. As a rule the sprinkler elements in the devices used are either of the stationary type, oscillatory type, or rotary type, and probably the latter is in greater use than the others. However. in Aso far as known, a satis. factory sprinkler has not been provided wherein the sprinkling is so adjustable as to cover various shapes of lawns or areas, yparticularly where these lawns or areas are of irregular shape. The ordinary rotary sprinkler causes sprinkling over a circular area andsomeoscillatory sprinklers will-cover arectangular area. InV so far as known, however, noV satisfactory sprinkler has .been rprovided which Vwill cause a sprinkling action to cover a predeterminedirregular.area such as is encountered in the normallawn to be sprinkled. Usually a rotary sprinkler covers only circular areas andit doubles the watering ofY certain parts of the area, due to overlapping of the circles. After using` therotary sprinkler,v it isthen necessary to sprinkle smaller and separated areas' which could not be reached by the rotary K sprinkler.

One oftheprincipal objectsof the present inventon is rto .providean improved sprinkling device which isso .constructed that the sprinkling actionwilliollow an area which may, practically be of any predetermined shape.

Anotherzobjec't of. the.. invention is. to provide a sprinkling device ofthis` character which is easily and-readily. adjustable so that thecontour vor, outline of the area. to; be sprinkled may be varied almost withoutxlimit so-.that it may be adjusted to sprinkle any shape of lawn.

Another object of the invention is to provide a.,.sprinkling.,deviceywhich may be adjusted to sprinkle. any shapejfof.` without at the same time sprinkling beyo` rea so as thereby to assure a thorou" "llng action of the entire lawn,.while l the disagreeable and 45 where the water. is throwrninm .pen objectsl sich ShQumf notherobject of the invention is to providfeea'v Spal'lnkicp'for accomplishing'th'e', aforesaid results whicht ata slow rat of speed so as to aslire'lnax urn range orfcoverage in accordance. withfa .predetermined areay to be sprinkled.

Another object of the invention is to provide a sprinkling device for accomplishing all of these 6 5 controlling the sprinkling action 2 results which may be manufactured and assembled with eiciency and also which may be sold at a reasonable price.

Another object of the invention is to provide a sprinkler such as last mentioned which will slowly turn where the distance the Water is thrown is greater., and will turn at an increased rate of movement wherethe distance the water is thrown is shorter.

And in general it is an object'of the invention to provide a sprinkling means capable of economical manufacture, which can be adjusted easily to satisfactorily cover regular or irregular areas up to the limit of the waterv pressure available.

Other objects of the invention will become apparent from the following specification, from the drawings relating thereto, and from the claims hereinafter set forth. y

For a better understanding of the invention reference may be had to the drawings wherein:

Figure 1 is a plan view of a sprinkling device constructed according to one form of the invention;

Fig. 2 is a side elevational view of the sprinkling taken substantially along the line/'S25 of 4; Fig. 6 is a cross-sectional view on a larger scale taken substantially along the line 6-6 of Fig. 1;

Fig. '7 is a cross-sectional view taken substantially along the line l-l of Fig. 6;

Fig. 8 is a cross-sectional view on a larger scale taken substantially along the line 8-8 of Fig. 1;

Fig. 9 is a cross-sectional View on a larger scale taken substantially along the line 9-9 of Fig. 1;

Fig. 10 is a cross-sectional view on a larger scale taken substantially along the line Ill-Ill of Fig. 1;

Fig. 11 is a cross-sectional view taken substantially along the line I I-I l of Fig. 3;

Fig. l2 is a detail view illustrating means for according to another form of the invention;

Fig. 13 is a side elevational ture shown by Fig. 12; and,

Fig. 14 illustrates, as an example, an irregular outline or area which may be sprinkled by a device constructed according tothe invention.

Referring to Figs. 1 and 2, the sprinkling device illustrated comprises a base l0 formedfrom view of the struc- 3-3 of Figrll; Fig. 4 is a cross-sectional View on a larger scale. taken substantially along the 'lined-l of Fig. "1f" Fig. 5 is a cross-sectional view cna larger scale j; y

'porting the sprinkler relatively wide metal strips II and I2 arranged in cross fashion and which are fastened together by rivets such as indicated at I3 although the strips may be welded if desired. For reenforcement purposes, the strip Il has a longitudinally extending depression I5 formed by pressing the metal outwardly towards its lower side and also a depression IE which extends crosswise of the strip. These depressions intersect at the center of the strip.` The other strip I2 `has similar depressions andithe depression portions on the uppermost strip fit into the depressions in the lowermost strip, from which it follows that the strips may be brought into flat contact with each other.

As shown best by Fig. 2, the strips II and I2 are bowed upwardly at their centers, then downwardly between the center and the outer ends, and then upwardly at their-outer ends so that the base thus formed may have four areas of econtact with the ground, such as indicated at I8, which are disposed. in 90 spaced relation. The outer ends of the strips II andY I2 terminate in outwardly directed ilanges such as indicated at I9, and these fianges support and are secured toa flat ring 22. This ring may be manufactured from coil stock by cutting the stock to separate one convolution ,from the coil, and then the ends of the convolution maybe welded. Then the ring is riveted or otherwise secured as indicated at 24 to the flanges I9.

The sprinkling device includes a pipe section 26 extending under the ring 22 and supported thereon between the projecting ends of the strips II and I2 by a strap 28 having its ends riveted to the ring as indicated at 29. The outer end of this pipe is threaded into one end of an internally threaded sleeve 3| and the other end of the sleeve .is'threaded onto a coupling 32 on the end of a hose 33. A sealing ring 34 is disposed in the sleeve 3I between the ends of the coupling 32 and thepipe 26. It should be observed here that there is no reduction in internal diameter through the connection between the hose 33 and the pipe 26 so that a larger flow of Water may be obtained. Also since this manner of coupling,y hose, and pipe requires turning of the hose, it is desired that the sleeve 3I be so mounted cn the pipe that only a part of one turn of the coupling 32 is required to thread the coupling fully into the sleeve against the sealing ring. As a result. the hose is not undesirably twisted and the coupling can be quickly connected and disconnected with respect to the sprinkler. Y

At itsother end, as best shown by Fig.. 4, the pipe 26 is threaded into an elbow 35, and this elbow, as seen in Fig. 5, has ears 36 and 31 projecting from opposite sides which are riveted as indicated at 38 to the central part of the base IU. Such elbow includes an upwardly directed end 39 which threadably receives the lower end of a pipe. section 4D constituting a fixed bearing for supelement. The rotary sprinkler element includes a sleeve 4I rotatably disposed in the pipe section 4I) and the lower end of this sleeve is outwardly ared. This flare is externally machined to provide a bearing surface 43 and the latter, during use of the sprinkler, has bearing engagement with a similar bearing surface 44 on the lower end of pipe 40. At its upper end, the sleeve 4I is threadedl into the middle. end 45 of a T-connection 46 having laterally directed internally threaded ends 41 and 48.

In order to facilitate assembly of these parts, the sleeve 4I is providedr with internal grooves 49 arranged in 90 spaced relation so as to fit a'v sleeve into the pipe 4D before the latter is threaded into the elbow 46, the sleeve may be held by lll) the tool mentioned during application of the T- joint on the upper end of the sleeve. It will be noted that a slight space 50 is provided between the upper end of the pipe 43 and the middle end of the T-joint so as to provide desirable clearance. During operationv of the sprinkler the force of the water directedV upwardlyI against the T- connection, lifts the sprinkler until the bearing surfaces 43 and 44 are in contact. This bearing engagement prevents leakage and Adrop in fluid pressure which would be caused by leakage.

The end 48 of the T-joint 46 threadably receives oneend'of a rod 55 which serves as a counterbalance. .The end 41 of the T-joint 46 threadedly receives a pipe 60 which, as best shown by Figs. 2 and 3, extends outwardly and then upwardly at an A"acute angle to the horizontal. At its outer end, the pipe has a nozzle 6I threadedthereinto, and it follows that water will leave the nozzle in a stream directed at an angle to the horizontal as mentioned. The construction so far described includes a sprinkling element which can rotate about a substantially vertical axis and a nozzle which will throw the water in a stream directedat anacute angle to the horizontal. rThe present invention is principally concerned with so controlling this stream oi water that the area sprinkled will be governed according to a predetermined and adjustable outline corresponding to the area to be sprinkled, and apparatus for accomplishing this-result will now be described.

Directing attention now to Fig. 1 in particular, the contour controlling device includes a spring type metal band or ribbon 62 having overlapping ends indicated at 63 and 64. These overlapping ends are retained together to form a complete annulus, by U-shaped clips 65 and 66 which, as best shownv by Fig. 8, have reversely turned ends 69 and 10 retaining the ends of the band together while permitting relative endwise movement thereof when desired. From this it should be apparent that .the band may be adjusted in length through movement of the overlapping ends relatively. .v

The band is anchored on the ring 22 at .four adjustable points, as seen in Fig. 1, by means of U-shaped clips 1|), 1I, 12, and 13, and each of these clips, as shown by Fig. 6, has vertically projecting lugs 15 and 16 for retaining the band Within the clip. Each of the clips is secured to v the ring 22 by means ofv a fastening'boltTll extending upwardly through the clip at the outer` side of the band, and having a Wing nut 1B on its upper end. The lower end of the bolt has a head 19 which is prevented from turning by an angular metal element co-operating with the head and ring 22 as will be readily understood. The ring 22 has openings at a number of points such as indicated Yat 82 so that the band retaining clips may be moved to different positions as found desirable.

It should be evident now that by arranging the clips in different positions and by changing the band or moving it circumferentially as desired, it may be shaped to most any contour found necessary. For instance, considering Fig. 1, itis evident that the band can be locked in `clip 10 and then adjusted for distance of water throw between clips 10 and 1I, and then clip 1I can be tightened. This operation can be repeated betweenclips 1I and 12 and then clip s 12 tightened, and then between clips 12 and 13 and then tightening clip 13. Adjustment of the section between clips 13 and 10 can be eifectedby sliding the ends of the band over each other, and they will stay in adjusted relation by friction between the contacting parts of the bands and clips. y

The band annulus thus provided constitutes a contour yelement or contour track which is adapt- -ed to be engaged by a roller 83, shown in Fig. 2,

which is turnably mounted on a pin 84 fixed to -an arm 85 projecting downwardly from the noz- -zle end of the pipe El). y 'bent at its upper end to provide a U-shaped por- This arm 85 is reversely tion 86 which straddles the end ofthe pipe and is pivotally mounted thereon, as seen in Fig. 11, by means of oppositely disposed but valigned screws 81 and 88. These screws respectively also extend through opposite legs of an .inner U- shaped element 90 and then through an eccentric sleeve 9| disposed on the end of the-pipe. Since the inner ends ofthe screws actually engage-the pipe, they become xed in position on the latter andprovide pivotal trunnions for the U- shaped element 90 and also the arm 85. and at the 'same time, the U-shaped element 90 may pivot independently of the arm 85. y

The inner elementll, as best shown by Fig. 3,

,has a sheet metal baille or blade 92 fixed'to its -base by means of screws 93 and as shown by the riull vand dotted line positions in Fig. 3, the baille is adapted to move `transversely of the water leaving the nozzle 6| so as variably to deflect the water depending upon the position of `the baille. A screw 94 threaded through the base Aportion of the upper end of the arm 85 provides an adjustable stop for limiting upward movement of the baille, and a spring 95 on the screw is vused to prevent loosening of the screw while permitting an easy ladjustment at any time. As seen in Figs. 1 and 3, the baille has an' intermediate. angled portionproviding an impact surface 91 against which the water may strike and this angled portion extends transversely of the baille at an angle to the stream of waterleaving the nozzle. This angled portion is so arranged that water striking the surface will create a.r

force component tending to turn the sprinkler clockwise as seen in Fig. i and this force will vary rdepending upon the amount the baille is moved into the stream of water.

Generally it might be said now that if water is passing through the nozzle 6| with force, -it will strike the baille 92- and hold it in its upper position against the end of screw 95 and this action of the water will also tend to swing the arm 85 counterclockwise as seen in Fig. 2. It follows from the this that the roller 83 will be held against the inner surface of the band |52, and if the sprinkler element is turning, movement of the roller around the inner surface of the band will cause 'a movement of the arm 35 and hence,a movement of the baille `92 in accordance with'the contour of the band. This movement of the baille relative to the stream of water leaving the nozzle 6i, will deflect the water and its trajectory or in other words, the distance the water is thrown will be changed in accordance with the position of the baille. If the ywater is to be thrown a longer distance, the band at that pointwould have to be farther from the vertical axis of rotation of the sprinkler element so yas to permit the-baille to shift further in an upward direction, whereas if distance is to be shortened,

the band must shift inwardlyv toward the vertical j to travel av maximum distance. In order to accomplish this result and at the same time ohtain .a positive drive that will not stop, an eccentric 98 is rotatably mounted on a pin V99 securedl inrthe larger portion of the eccentric sleeve ll onl the pipe 60.I The eccentric 98 has a blade type rotor |30 secured to it, and this rotor projects onlyI partly into the stream of water ilowing from the-nozzle. The blades of the rotor are vnarrrow andan/gled solas to effect driving of the rotor by the water, v'but the speedangularity of the blades in addition to the smallprojectionthereof into the stream .enables driving the eccentric at Va high speed'w-hile at the same time preventing v any undesirable interference with the stream of water. It is preferable'that the rotor project less than half through the stream and that it not turn through more than about one-fourth of the sectional area of the stream. A spacing sleeve HH is provided between the rotor and eccentric sleeve 9| and a collar |02 is fastened on the outer end of the pin 99 so as to hold the eccentric 9,8 and rotor |00 on the pin 99. A bearing washer |03 also is disposed between the collar |112 and the eccentric 9B.

As the-'water travels rapidly past the rotor (BQ, the latter and the eccentric 98 are Vdriven at 'a high speed. and it is evident that lwhen the heavier part of the eccentric lis moving at the side of the pin 99, it will tend to move the sprinkler element in one rotational direction, and 'to the contrary, when the heavier part of v the eccentric is travelling at the other side ofthe pin, it will tend to turn the sprinkler in the opposite direction. A second force for driving the sprinkler in one direction only is created by angling the pipe 60 a slight amount as indicated Aat 1Min Fig. 1. In otherwords, as seenin Fig. ll, the force caused by the oli' center uid reaction resulting from the angle in the pipe B0, urges the sprinkler constantly in one direction whereas rotation ofthe eccentric alternately aids and opposes this motion. A third force may be present if the water strikes the baille surface 97 and this lforce will vary depending uponthe lposition Yof the baille and is an accelerating force as Vmaintain rotation at a relatively slow speed. YIn

the present device, the off center jet is adjusted to rcrea-te a torque which is less than that required to overcome the static friction. The operation of the eccentric creates, as stated before, forces alternately aiding and opposing the jet force,l and when the force aids the rotation, the combinaytion of forces is suillcient to overcome the static friction whereas when the forces are opposed, rotation perhaps may actually stop. While the sprinkler will thus start and continue rotation `it a slow speed, it possibly is a vrotation by very vovercome the static friction.

- provide 4and this may be accomplished by using a smaller small increments. In any event a very slow rotation is obtained and the sprinkler will also lThe third vand variable force caused y by -the baiilesurface acts to vary the speed generally Y in accordance with variations in distance the water is to be thrown so as to increase the speed r angular velocity where the distance is short and to allow or cause slower rotation or decreased angular velocity where the distance is greater. In this way generally thesame amount of water may be sprinkled per unit of area regardless of the length of* throw. For a long throw the surface 91 may not be engaged by thewater and then as-the throw shortens, the y, surface is engaged more and more by the jet to accelerate the rotation. It should be understood that the sprinkler rotates slowly at all times but that on shorter throws its rate of turning is increased enough to secure wetting of the area to approximately the same degree as where the throw is greater.

In other words, the water is sprinkled for a progressively longer. time as the length of the throw increases.

In practice, the sprinkler may be placed in an approximately central location on the lawn, and then it may be turned for instance, to bring the clamp 10 into a position where it is aligned with Vthe axis of rotation of the sprinkler and a part of the lawn requiring'the longest throw of water s uch as the most remote corner. The throw of the sprinkler then may be adjusted by .means of the screw 94. With clamp 10 tightened and clamp 1I loose, the `band between clamps 10 and 1I may be changed in form and length while experimentally moving the sprinkler between these clamps until the throw of water follows the contour of the lawn. Then clamp 1I is tightened. Adjustment between clamps 1l and 12 is secured in the same way and then clamp 12 is tightened. Finally, adjustment .of the band between the clamps 12 and 13 is effected by means of the overlapping ends, it being understoodthat friction between the clips 65 and 66 and band portions will hold such ends in adjusted relation. It should be observed that the clamps can be adjusted around the ring 22 sol.

as to place themas desired. and usually no difliculty Would be encountered in positioning the sprinkler so that the four clamps can be located in alignment withY four points on the lawn about equidistant from the sprinkler. Attention is directed to a bar IIB shown on clamp 1 2 which may be swung into a position where it will stop the arm 85, and this may be desired at times when axed, non-rotational, spray is desired to sprinkle a particular area.

It may be found desirable in certain cases to a hump in the band at one or more places,

bend segment indicated at H2 in Fig. l which may be attached to the band 62 by clamps such as those previously described. Fig. 14 shows approximately the outline of an area which would be sprinkled by the band as seen in Fig. l.

Once adjusted and xed, the sprinkler would continue to cover only the area of the lawn and it could be placed in the same position each day or as often as the lawn is sprinkled, without further adjustment,

Figs. l2 and 13 show another form of the invention where instead of using an eccentric rotor, turning ciy thx.J sprinkler is effected by a twisted baille indicated at 'l `Il which may be mounted on the pipe in the sarneway as the bafe 92. The

vtwist in vthis modified form of balewould create adriving vforce and at the Sametime, theV posi- -tion of the b ale as eifected by .the roller 83v traveling on the band, would govern the` throw of the water. M

Althoughmore than one form'of the invention has been illustrated and described in detail, it

`rangedannularly about the base with the wider sides ofthe band upright relative to the base,

adjustableclampsY operable for securing the clamps in adjusted position about the periphery of the base and adjustably securing the band to the base at aplurality of points spaced `about theperiphery of said base, said clamps releasably gripping said band so that the band segment betweeneachpair of points may be varied in length and therefore shape.l and a follower rotatably carried by the base and adapted to contact one side of the band. n

2. In a lawn sprayer adapted to be adjusted to spray `a vwide variety of irregularly shaped areas. in combination, a base, a metal band arranged annularly about the base with the wider sides of the band upright relative to the base. adjustable clamps on the base operable for securing the clamps in/'adjusted :position about the :periphery ofthe base and adjustably engaging the band at spaced points so that the band may be linearly shiftedy relative to the clampsr so that the clamps may be shifted on the base, and a follower rotatably carried by the -base and contacting a vertical side of the band.

:securing the clamps in Vadjusted position about -the periphery of ygaging thepband at spaced points so that the band may be linearly shifted relative to the the b ase and adjustably enclamps so that the clamps may be shifted on the base, said band having overlapping ends movable linearly of eachother so that the length of the annulus vmay be changed, means for holding the ends in adjusted positions, and a cam follower' carriedl by 4the base and contacting a vertical side ofthe band.

LA lawn sprinkler adjustable to water areas of variable size which may be circular, rectangular, or of a wide variety of irregular shapes. said sprinkler comprisinga base, a sprinkler head rotatably mounted `on said base and including a nozzlev vadapted to throw water outwardly of ,said base, means for rotating said sprinkler head, flexible metal band cam means, clamps mounting said flexible metal band cam means on said` base and adapted to be adjusted to maintain saidmetal band` cam means in a shape conforming operatively to the shape ofthe area to be watered, an .arm pivotally mounted on said sprinkler head, a cam follower on one end of said arm and engaging said cam means, and a baille on the other endrof said arm and so related to vsaid nozzle that swinging of said arm, in response to movement of ,said cam follower along lsaid canilrneansl movessaid baille variably into and out of the water jet thrown from the nozzle.

5. A lawn sprinkler adjustable to substantially uniformlywater areas of variable size which may be circulanrectangular, or of a wide variety of irregular shapes, said sprinkler comprising a base,

a sprinkler head rotatably mounted on said base and including a nozzle adapted to throw water outwardly of said base, means for rotating said l sprinkler head,lexible metal band cam means,

follower along said cam means moves said baffle variably into and out of the water jet thrown from the nozzle, said baille having the portion adapted to be moved into said jet of water so inclined relative to said sprinkler head. that the action of said jet of water on said baille creates a force augmenting said means for rotating said sprinkler head.

6. A lawn sprinkler adjustable to substantially uniformly water areas of variable size which may be circular, rectangular, or of a wide variety of irregular shapes, said sprinkler comprising a base, a sprinkler head rotatably mounted on said base and including a nozzle adapted to throw water outwardly of said base, means for rotating said sprinkler head, llexible metal band cam means including overlapping end portions movable linearly of each other whereby the effective length thereof may be readily varied, clamps mounting said cam means on said base and adapted to be adjusted to maintain said metal band cam means in a desired shape conforming operatively to the shape of the area to be watered, an arm pivotally mounted on said sprinkler head, a cam follower mounted on one end of said arm and engaging said cam means, and a baille mounted on the other end of said arm and so related to the nozzle that swinging of said arm in response to movement of said cam follower along said cam means moves said baille variably into and out of the water jet thrown from the nozzle, said baille having the portion adapted to be moved into said jet of water so inclined relative to said sprinkler head that the action of said jet of Water on said baflle creates a force augmenting said means for rotating said sprinkler head.

'7. A lawn sprinkler adjustable to substantially uniformly water areas of variable size which may be circular, rectangular, or of a wide variety of irregular shapes, said sprinkler comprising a base, a sprinkler head rotatably mounted on said base and including a nozzle adapted to throw water outwardly of said base, means for rotating said sprinkler head, flexible metal band cam means having overlapping end portions movable linearly of each other whereby the effective length thereof may be readily varied, a plurality of ad justable clamps mounted on said base and operable for securing the clamps in adjusted position about the periphery of said base and releasably gripping said metal band cam means so that the length of said cam means between each of said clamps may be varied as desired, an arm pivotally mounted on said sprinkler head, a cam follower on one end of said arm and engaging said cam means, and a baille on the other end lof saidarmand so related to the nozzle that swinging of said arm in response to movement of said cam follower along said cam means moves said baille variably into and out of the water jet thrown from the nozzle, said baffle having the portion adapted to be moved into said jet of Water so inclined relative to said sprinkler head that the action of said'jet of Water on said baille creates a force augmenting said means for rotating said sprinkler head.

8. A lawn sprinkler adjustable to substantially uniformly water areas of variable size which may be circular, rectangular, or of a wide variety of irregular shapes, said sprinkler comprising a base, a sprinkler head rotatably mounted on said base and including a nozzle adapted to throw water outwardly of said base, means for rotating said sprinkler head, flexible metal band cam means having overlapping end portions movable linearly of each other whereby the effective length thereof may be readily varied, a plurality of clampsy mounted on said base and adjustable relative thereto and releasably gripping said metal band cam means so that the length of said cam means between each of said attaching means may be varied as desired, an arm pivotally mounted on said sprinkler head, a cam follower on one end of said arm and engaging said cam means, a baille on the other end of said arm and so related to the nozzle that swinging of said arm in response to movement of said cam follower along said cam means moves said baille variably into and out of the water jet thrown from the nozzle, said baille having the portion adapted to be moved into said jet of water so inclined relative to said sprinkler head that the action of said jet of water on said baille creates a force augmenting said means for rotating said sprinkler head, said means for rotating said sprinkler head including an impeller wheel mounted on said head for rotation about an axis spaced from but substantially parallel to the axis of said nozzle, said impeller wheel having a plurality of similar blades spaced equiangularly about its periphery and adapted to be engaged by the jet of water from said nozzle for rotating said wheel, said wheel being disposed to project into the jet of water from said nozzle to an extent affording substantially uniform distribution of the water of jet throughout the radial extent which the jet is thrown, and an eccentric rotated about the axis of said impeller wheel by the latter and disposed out of the path of the jet from said nozzle, the axis of said nozzle being spaced 'from the axis of rotation of said sprinkler head so that the jet reaction at said nozzle ltends to rotate said sprinkler head and the rotation of said eccentric intermittently producing a force cooperating with said jet reaction at said nozzle to produce rotation of said sprinkler head.

9. A lawn sprinkler adjustable to substantially uniformly water areas of variable size which may be circular, rectangular, or of a wide variety of irregular shapes, said sprinkler comprising a base, a sprinkler head rotatably mounted on said base and including a nozzle adapted to throw water outwardly of said base, means for rotating vsaid sprinkler head, flexible metal band cam means having overlapping end portions movable linearly of each other whereby the effective length thereof may be readily varied, a plurality of clamps mounted on said base and adjustable relative thereto and releasably gripping said metal band cam means so that the length of said cam means between each of said attaching means may be varied as desired, an arm pivotally mounted on' said sprinkler head, a cam follower mounted on one end of said arm and engaging said ca m means, a baie mounted on the other end of g said arm and so related to the nozzle that swinging of said sprinkler head, and means for varyingv the angular position of said bafe relative to said arm to correspond to the size of the area it is desired to Water.

WILLIAM H. MANNING.

REFERENCES' errno The following references are oi' record in th file of -this patent.

UNITED STATES PATENTS Number 20 Number Name Date Pilkington Mar.` 16, 1915 Stanton July 27, 1926 Orr Aug. 31, 1926 Elder \Aug. 2, 1927 Orr L Oct. 8, 1929 Nelson June 17, 1930 Jacobson Dec. 12, 1933,. Norland Mar. 13, 1934 Jacobson June 12, 1934 Jepson et al Dec. 15, 1936 Thompson Aug. 17, 1937 Dorman Jan. 23, 1940 Gollmer Jan. 5, 1943 Higgins Mar. 23, 1943A Hoffer Jan. 29, 1946 FOREIGN PATENTS Country Date Great Britain July 21, 1927 Great Britain June 28, 1928 Germany Apr` 16, 1930 

